Robert Peraza, who lost his son Robert David Peraza, pauses at his son's name at the North Pool of the 9/11 Memorial at the site of the World Trade Center. Justin Lane/pool/Getty Images hide caption

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Ali Soufan testifies from behind a black curtain and a room divider to protect his identity in 2009, during a Senate hearing to examine the Bush administration's detention and interrogation program. Manuel Balce Ceneta/AP hide caption

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Keri McMorrow, 7, visits the memorial pool where her uncle's name is engraved, during tenth anniversary ceremonies of the September 11, 2001 terrorist attacks at the World Trade Center site. Pool/Getty Images hide caption

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A worker looks over the field of debris of the collapsed south tower area of the World Trade Center in March 2002 in New York City. Many workers chose not to wear the respirators provided for them, except in the most extreme conditions. (Spencer Platt/Getty Images) Spencer Platt/Getty Images hide caption

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Former Attorney General John Ashcroft reviews his notes on Capitol Hill in 2008, before testifying before the House Judiciary Committee hearing looking into administration interrogations rules. Susan Walsh/AP hide caption

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Men pray at the Islamic Center of Murfreesboro. The congregation wants to build a bigger mosque to worship in, but has faced stiff opposition from citizens who fear the local Muslims have a political agenda. Debbie Elliott/NPR hide caption

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